热带海洋海气相互作用的区域差异

REGIONAL DIFFERENCES OF AIR-SEA INTERACTIONS IN TROPICAL OCEANS

用 NCEP/ NCAR4 0年再分析 10 0 0 h Pa月平均风场资料及 COADS月平均海表温度资料 ,对热带西、中、东太平洋、热带大西洋和印度洋五个区域的海气异常作了奇异值分解 (SVD)。比较区域间 SVD的主要参数和分析第一奇异向量及其时间系数表明 ,热带海气相互作用可区分为三类 :热带东、中太平洋属‘单元型’,ENSO是唯一重要的过程 ;热带西太平洋、印度洋属‘二元型’,除了 ENSO过程 ,还应存在另一重要过程 ;热带大西洋属‘多元型’,其构成复杂 。

The singular value decomposition (SVD) of air sea anomalies in the tropical western,central,and eastern Pacific oceans,and eastern Pacific oceans,and the tropical Atlantic and Indian oceans has been conducted in this paper by using the 1000 hPa monthly mean wind field of the NCEP/NCAR 40 year reanalysis data and the COADS monthly mean sea surface temperature.The comparison of main parameters of SVD for different sea areas and the analysis of first singular vectors and their time coefficients suggest that tropical air sea interactions may be divided into three types:the interaction in the tropical central eastern Pacific belongs to monistic type,in which ENSO is the sole important process;the interaction in the tropical western Pacific and Indian oceans belongs to dualistic type,in which in addition to ENSO there should be the another important process;the interaction in the tropical Atlantic ocean belongs to puralistic type,the process is complicated and the ENSO process is not evident.